A nurse is caring for a client who is receiving oxygen at 2 L/min via a nasal cannula. The nurse recognizes the client is receiving which of the following inspired oxygen concentration?

36%

70%

50%

28%

Answer and Explanation

The Correct Answer is D

D. 28%:

When a client receives oxygen via a nasal cannula at a flow rate of 2 L/min, the approximate inspired oxygen concentration is around 24-28%. This is because each liter of oxygen delivered through a nasal cannula adds approximately 4% to the baseline room air concentration of 21%. Therefore, at 2 L/min, the client would be receiving approximately 24-28% inspired oxygen concentration.

A. 36%, B. 70%, C. 50%:

These percentages are not consistent with the oxygen concentration delivered via a nasal cannula at 2 L/min. Higher flow rates or alternative oxygen delivery systems, such as masks or high-flow nasal cannula, would be needed to achieve these concentrations.

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Correct Answer is D

Explanation

A. Light-headedness when standing up:
Elevated potassium levels (hyperkalemia) can lead to muscle weakness or paralysis, cardiac dysrhythmias, and even cardiac arrest. Light-headedness when standing up is more commonly associated with orthostatic hypotension or volume depletion rather than electrolyte imbalances like hyperkalemia.

B. Weak quadriceps muscles:
Weakness in the quadriceps muscles is not typically associated with the electrolyte imbalances presented in the scenario. Hyperkalemia can cause muscle weakness, but it is not specific to the quadriceps.

C. Decreased deep tendon reflexes:
Decreased deep tendon reflexes are not typically associated with the electrolyte imbalances presented in the scenario. Hyperkalemia can lead to hyperreflexia or absent reflexes, but it is not specific to decreased deep tendon reflexes.

D. Tingling of extremities:
This is the correct answer. Hypocalcemia, indicated by the low calcium level in the scenario, can manifest with symptoms such as tingling or numbness of the extremities, muscle cramps, and tetany. Calcium plays a crucial role in nerve transmission, and low levels can lead to sensory disturbances like tingling in the extremities.

A. "It might help if I tried sleeping only on my back." B. "I’ll sleep better if I take a sleeping pill at night," C. "If could lose about 50 pounds, I might stop having so many apneic episodes." D. " I’ll get a humidifier to run at my bedside at night."

Correct Answer is C

Explanation

A. "It might help if I tried sleeping only on my back."
Sleeping on the back can actually worsen obstructive sleep apnea because gravity can cause the tongue and soft tissues to obstruct the airway more easily. The recommended position to reduce apneic episodes is to sleep on the side.

B. "I’ll sleep better if I take a sleeping pill at night."
Taking a sleeping pill can relax the muscles of the throat, which might worsen sleep apnea by increasing the likelihood of airway obstruction during sleep.

C. "If I could lose about 50 pounds, I might stop having so many apneic episodes."
Weight loss is a key factor in reducing the frequency and severity of obstructive sleep apnea. Excess weight, particularly around the neck, can increase the risk of airway obstruction during sleep.

D. "I’ll get a humidifier to run at my bedside at night."
While a humidifier can make the air more comfortable to breathe, it does not directly reduce the number of apneic episodes. It might help with symptoms like dry mouth or nasal congestion but is not a primary treatment for obstructive sleep apnea.

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A nurse is caring for a client who is receiving oxygen at 2 L/min via a nasal cannula. The nurse recognizes the client is receiving which of the following inspired oxygen concentration?

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Naxlex Comprehensive Predictor Exams

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Explanation

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Explanation

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